Adaptive filter representation
US8942505B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 17, 2007 |
| Grant date | Jan 27, 2015 |
| Priority date | — |
| Expiry date | Oct 28, 2030 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N19/82
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
The present invention teaches a filter process used in intra or inter prediction of pixel blocks. A first, optionally interpolation, filter is applied in the first filter process to get filtered, optionally interpolated, pixel values. A differential filter and an adaptive gain are utilized in the second process for improving the prediction performance. The adaptivity of the gain can be made even on block basis, allowing a fine tuning of the pixel prediction and/or a fine tuning of pixel rotation and zooming. Alternatively, a combined one-step filter process using the interpolation filter, the differential filter and the adaptive gain is applied to the pixel values.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.